Elevating-truck.



M. E. BAILEY.

ELEVATING TRUCK.

APPLICATION FILED Nov. 29, 1913.

EJ4 7799 Patented July 20, 1915.

COLUMBIA PLANOURAIH COHWASHINGTDN, 1). c4

UNITED ATES FATE @FFTQE IVIILESE. BAILEY, OF WASHINGTON, DISTRICT OF COLUMBIA.

ELEVATING TRUGK.

I To all whom c'tmay concern:

I Be it known that Llvlinns BAiLEY, a citizen of the United States of America, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Elevating; Trucks, of which the following is a specification.

This invention relates to improvement in elevating trucks, and its main object is to design a simple and inexpensive truck adapted to move articles of furniture, heavy filing cabinets, stoves, bookcases, bureaus, chiffonniers, desks, automobiles, lathe machinery, and any other articles which stand on legs or wheels of sufiici'ent height to enable the truck to be run under, or articles which may be placed on a base, raised platform, or box, with legs, such as paper, parts of machinery in course 'ofconstruction, chips from lathes, etc. f

. It is also my purpose to provide anew and improved lever mechanism for operating all kinds of lifting jacks and'elevating'devices.

Other special features of my invention will be pointed out. hereinafter.

One embodiment of inyinvention is shown in the accompanying drawingwherein Figure 1 is a plan: view of, a complete truck constructed in accordance with this invention. Fig.- 2 is an end elevation of the same. Fig. 3' is a sectionaldetail view on an enlarged scale of one of the corner posts showing how it is attached to the frame. Fig. .4 is a fragmentary sectional viewof the retaining hook showing a slightly modified form, Fig. 5 is a fragmentary perspective view of a modified form 'offone of the secondary levers; c

Similar reference characters designate like parts throughout the several views.

The truck comprises'ess'entially a suitable base frame, a movable platfo'rm andan elevating mechanismconnecting said base and platform. The. whole leverage system: by

which the platform is raised and lowered is constructed according to this invention so as to givetlie maximum leverage with a minimum of parts, and so as to occupythe minimum space in a vertical direction. 'Only two sets of levers are used, the first set comprising a single lever of the second class, which I term the actuating lever, and the second set comprising a plurality of levers,

[ preferably of the first class, each of which is connected as near the same point on the ac- Specification of Lettersrfatent. Patented July 29, 19151 Application filed November 29 1913. Serial No. 803,645.

tuating lever as the mechanical construction will permit. These levers, which I term secondary levers, eXtend in fan-like or radial formation from these adjacent points of connection to the actuating leverto separated points on the platform, preferably to the corners, so that' the lifting force on the platform is distributed where most needed, while the actuating force need only be applied at one point on the actuating lever. The specific construction of these parts is preferably as follows:

The truck as shown comprises a main base frame made up of angle bars 1 on the rear and two sides. The angle bars are joined at the front by a bent plate 2, thus completing the four sides of the frame. The frame is mounted onsuitable rollers 3 so that the truck may be readily moved in any direction', Across the back is also secured a flat plate 4: to which are secured two plates having upstanding ears 5 which form a bearing 6 for the rear of the actuating'lever7. Said actuating lever is designed to be operated by 2 of plate 2 and is designed to catch over the lever 7 when the lever is in the downmost position and the movable frame or platform is in the uppermost position. Preferably, said lever 7 assumes a substantially horizontal position so, that a maximum leverage may be obtained by the foot. As shown in Fig. 2, the pivot end is slightlyhigher than the pedal end 8, since end 8' is engaged under hook 9 but it will be apparent that when the lever is released, the descent of the platform will "raise end 8, through the connections hereinafter described, above said pivot 55. r The pivot 6-is made sufficiently loose so'that sufficient lateral swing may be given the lever so as v to engage it with and disengage it from the hook 9.

j The; secondary levers O are pivotally secured' to an intermediate portion of bar 7 by means of links 11. Each of said levers 10 sets of jointsbymeans ofwhich the links are connected to the various levers are pivotal, so that upon swinging the actuating lever upon its hinge 6, the inner ends of the u vraised1.to.: diiferent heights as required. i IIl secondary leversi 1 0 willybe moved; freely up and down. Said secondary levers are lost motion of the actuating leverneed take place. Any form of locking means for nuts 26; may ibe provided such as nuts 27. v

In Fig. 4 is shown a modified form of '-.hooki9 which is provided with a plurality ofteeth 28, so that the platform may be this modified construction the teeth are pivoted to the base-frame by means of'uprights 14 having flattened heads 1 5.,fLSaid uprights or bolts extend through"holes%in the main frame. Pivot pins" 16 extend through both bars of thelevers and through holes in the flattened head 15. The levels 10 are pivotally secured to theplatformT'18 by being pivoted to depending posts 17 which may or may not be a part of the platform. I have shown the; posts as' being formed of separate bars'secured to the "platform in any approved manner such. as' by providing the end posts with a horizontal portion 18 and bolting or. otlierwise securing the'angle iron 19 which makes upthe greater part of the top frame to. saidhdrizontal portion 18 as is shown. in' Fig.3. The lower portion of the, post'17. maybe made cylindrical as is shown. at/ 20,.and' is vertically movable in a hole 21, providedin the base 1. 'Acrossfthe'front offthe'platform is provided an angle iron .22 which is secured to the main angle iron 19. The upstanding portion 23 of said angle iron22 serves as a stop to limit the movement of the truck as it is thrust under the object to be raised. Stops 24 are also provided on the angle iron 1 forming the base which are adapted to abut against the legs of the base of the article to be moved.

In the embodiment ofthe invention illustrated stops 24 are positioned to the rear of stop' 23 so that the truck may beflused' with articles, the legs of which extend out. beyond the main body. The truckis provided with a bail shaped handle 25 pivot ally attached to the topframe. -As shown in Fig. 1, the'handle is in thefolded position so-as to be out of the way, while in Fig 2it is shown as partially raised. ItLis-readily apparent that it may be used to both push-and pull the truck. Aparticular feature of the invention lies in the special form of pivots 14 which support the levers 10. It will benoted that these pivots are. in the form of bolts supported on the frame by'means of-niuts' 26. It is possible to adjust the height to which the platform-may be raised or lowered by simply turning the nuts 26, which -will raise or lower the bolts 14. This featureis of greatv importance, as it gives the truck a greater range of adjustment and adapts its use tomany different kinds ofa'rticles. "l'lhe height of the platform may. beisoaadjusted that the platform will'bar'ely slide under the base of a case or file cabinet, so that no shown as beveled so as to grip more firmly the actuating lever 7. The hooks-9 or 9 may be secured in-place by. a nut99.

Fig. 5"shows a modified form of secondaryl'ever" 10 which is made of alsingle bar. 'T V hen such bar is, used the b 'olts l may be provided with adivided head 15, which extends on each side"; of saidbar and is, piv ota lly secured' 'theretofby means of a rivet or boltj80.

The movable'f'rame orjpla'tform maybe connected .to' the fixedflframefl by means bf spir'al ,ieXtension springs 181 which act to draw the 1 movable frame quickly intoLthe lowered position when the [lever is released from ho ok19,"so"that the truck may be readily withdrawn fronibene'ath an object after moving'it .to the desired position. i The operation of the truck will be readily apparent fromthe' foregoing description.

'The platform is shown in Figl 2 as raised with the lever secured under the hook. Upon releaseofthe lever the platform will be immediately'idrawndown by .jgravity and by i the springs Sl, and the lever thrownnp'. By pressing ones foot-on pedal 8 the lever 7 is swungdownwardly, "thus swinging the outer endsof leverslOdow'n, and elevating the platform. It is readily apparentithat with my system of levers heavy' loadszmay be raised with slight e'lfort, asingle man being able to move the heaviest filing cabinets u i e My invention is obviously capable of "embodiment in v many different forms, and I'ido not limit myself unnecessarily toany offthe details'of construction. as hereindescribed,

as"it"isifapparent"that many modifications may be made within the scope of the following claims.

1.. In an elevating truck, afbase and a movfable; platform,.-. actuating means" therefor, comprising 'a substantially horizontal actufating lever pivoted 'on said basejaiid'extendingsilbstantially the full length ofsa'idbase and a. secondaryillever fulcrumedt fintermediate'its-jends onj'said base and pivo'tallysebase and .a movable platfonn, pactu'ati ng means therefor, comprising an actuating lever pivoted on said base and a plurality of secondary levers pivoted on said base and connected adjacent their inner ends to adjacent points on said actuating lever, said secondary levers being connected to separated points on said platform so as to elevate the same.

3. An elevating mechanism, comprising a base and a movable platform, actuating means therefor, comprising an actuating lever pivoted on said base, and a plurality of radially arranged secondary levers fulcrumed intermediate their ends on said base and connected adjacent their inner ends to adjacent points on said actuating lever, said secondary levers being connected adjacent their outer ends to said platform.

4:. In an elevating truck, a base and a movable platform, actuating means therefor, comprising an actuating lever pivoted at one end on said base and a secondary lever. formed of two flat bars spaced apart, means for connecting said lever to the base comprising a bar having a fiat head pivotally supporting said secondary lever intermediate its ends, a flat link connecting one end of said secondary lever and an intermediate portion of said actuating lever, and a flat post supporting said platform and connected to the opposite end of said secondary lever, the flat bars of said secondary lever, extending on each side of each of said connecting means and being spaced thereby, and pivotally connected thereto by pins extending through alined perforations in said bars and connecting means.

5. In an elevating truck, a base and a movable platform, actuating means therefor, comprising an actuating lever pivoted on to said base, and a secondary lever pivotally secured adjacent one end to said platform and adjacent the other end, to said actuating lever, and an adjustable fulcrum member for said secondary lever, mounted on said base and comprising a threaded shank and a nut on said shank, said nut resting on said base and supporting the fulcrum member.

6. An elevating mechanism, comprising a base and a movable platform, actuating means therefor, comprising an actuating lever pivoted on said base and a plurality of radially arranged secondary levers, a vertically adjustable fulcrum for each of said levers, each of said levers being connected adjacent its inner end to said actuating lever and connected to said platform so as to raise and lower the same.

7. An elevating mechanism, comprising a base and a movable platform, actuating means therefor, comprising an actuating lever pivoted on said base, and a plurality of radially arranged secondary levers, a vertically adjustable fulcrum for each of said levers, comprising a nut resting on said base and a bolt threaded in said nut and supported thereby. V

8. An elevating mechanism, comprising a base and amovable platform, tension springs connecting said base and platform, actuating means therefor, comprising an actuating lever pivoted on said base and a plurality of secondary levers pivoted on said base and connected adjacent their inner ends to adjacent points on said actuating lever, said secondary levers being connected to said platform so as to elevate same, and locking means for said actuating lever.

9. In an elevating truck, a base and a movable platform, actuating means therefor comprising a centrally mounted actuating lever pivoted at one end adjacent one end of said base and normally extending beyond the other end of said base so as to serve as a foot pedal, and a plurality of secondary levers pivotally mounted on said base and connected near their inner ends to adjacent points on an intermediate portion of said actuating lever, and at distant points to spaced portions of said platform.

In testimony whereof I afiix my signature in presence of two witnesses.

MILES E. BAILEY.

Witnesses:

J OHN T. WEST, E. J. THOMPSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 6. 

